TWI468039B - Base station, femtocell and handover monitoring method thereof - Google Patents

Description

Base station, micro base station and its handover monitoring method

The present invention relates to a base station, a micro base station and a handover monitoring method thereof; more specifically, the base station, the micro base station and the handover monitoring method thereof of the present invention notify the micro base station to monitor an action by the base station The device determines whether to change hands.

Although the wireless mobile communication network has been developed for many years, users often face problems such as poor reception and slow transmission speed when using mobile devices in indoor environments, so that users must use different networks depending on the region. The interface has created a multi-mode wireless communication network device mobile device. However, the cost of a multi-mode mobile device is high, causing a large burden on the user. In addition, the wireless mobile communication network also faces the problem of bandwidth limitation. Specifically, since the cellular network is characterized by the bandwidth provided by users in a specific base station area, when the wireless mobile communication network user is at In an outdoor environment, the bandwidth that each user can enjoy is inversely proportional to the number of valid users in the area. As the number of users of wireless mobile communication networks increases, the load on outdoor cellular base stations becomes heavier and heavier, and the bandwidth available to each user's mobile device is getting smaller and smaller. In order to solve the above problems, some vendors established a commercial alliance called the Femto Forum in 2007 and promoted the home micro-base station (Femtocell) as a complete solution.

The Micro Base Station is an ultra-small, low-power base station designed for indoor use, operating in a licensed wireless frequency band, such as the Worldwide Interoperability for Microwave Access (WiMAX) network or third-generation wireless Communication Technology (Third Generation; 3G) network. The micro base station transmits the mobile devices in the cellular network to the Internet service provider through a broadband fixed network in the home, such as a Digital Subscriber Line (DSL) modem or a Cable Modem ( Internet Service Provider; ISP) Network connection to the carrier network.

The establishment of a micro base station has at least two advantages: First, the micro base station has the characteristics of simple structure, low price and easy installation, so it is economical to use a micro base station instead of a honeycomb base station to cover indoor wireless communication; Second, when the mobile device enters the micro-base station signal coverage, the micro-base station replaces the cellular base station to provide the services required for the mobile device, which not only increases the signal strength of the room, but also avoids the coverage with the cellular base station signal. All mobile devices within range compete for network usage rights.

Changing the mobile phone system is an indispensable part of the field of wireless mobile communication networks. The so-called handoff is a technical means that needs to be carried out when a mobile device is to be transferred from a base station that originally provided the service to a service provided by another base station. In general, the types of hand changes can be roughly divided into two categories. The first is a hand-off initiated by the mobile device. When the mobile device finds that the signal strength is below a certain threshold, it initiates a hand-over scanning mechanism to search for nearby base stations that can provide services, and selects a The most appropriate base station performs the action of changing hands. The second type is called network-initiated handover, and the base station (called the service base station) that is serving the mobile device actively requests the mobile device to switch hands to a base station adjacent to the mobile device according to a neighboring base station list ( Called the target base station). The list of neighboring base stations can be obtained by periodic scanning of the mobile device or by the service base station actively requesting the mobile device to scan.

When a mobile device is located in a range where the strength of both the base station and the micro base station is good, since the signal strength provided by the base station is still good, the mobile device will not perform a hand-over scan to know the The existence of a micro base station has caused the micro base station to be idle. The problem of idleness of such a micro base station can be solved by the network-activated mobile phone system, but the conventional network-activated mobile phone system cannot effectively solve the problem of the idleness of the micro base station. Specifically, the network-activated handoff requires the base station to determine the range of the mobile device's signal into the micro-base station by means of positioning, etc., in order to inform the mobile device to perform the hand-over scanning. However, the complex environment of the metropolis is likely to cause a sharp drop in the accuracy of the positioning, resulting in blind switching of the mobile device, resulting in delays in data transmission, resulting in a decline in service quality.

In view of this, how to establish a mobile phone system, and design corresponding base stations and micro base stations according to the mobile phone system to effectively solve the problem of idle micro-base stations, is an urgent problem for the industry players in this field.

The object of the present invention is to provide a base station and a handover monitoring method thereof, and a femtocell and a handover monitoring method thereof, so as to effectively solve the problem of the idleness of the micro base station in the prior art and the network. The problem caused by the road-changing hand change.

To achieve the above object, the present invention provides a base station, and a wireless network system includes a server, a mobile device, the base station, and a micro base station. The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a signal coverage area and is used to wirelessly connect to the mobile device when the mobile device is within the coverage of the signal. The wired network interface is connected to the server and the micro base station, and after the wireless network interface is wirelessly connected to the mobile device, the server obtains information related to the mobile device. The processor is configured to determine, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal. After the processor determines that the micro base station corresponds to the mobile device, the wired network interface transmits a monitoring signal to the micro base station, wherein the monitoring signal instructs the micro base station to monitor the mobile device on an operating frequency. The wired network interface further receives a response signal corresponding to the monitoring signal from the pico base station. The wireless network interface further transmits a handoff signal to the mobile device in response to the signal, and the handoff signal indicates that the mobile device is handed over to the micro base station.

To achieve the above objective, the present invention further provides a base station, wherein a wireless network system includes a server, a mobile device, a micro base station, and the base station. The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a signal coverage area and is used to wirelessly connect to the mobile device when the mobile device is within the coverage of the signal. The wired network interface is connected to the server and the micro base station, and is configured to obtain information related to the mobile device from the server after the wireless network interface is wirelessly connected to the mobile device. The processor is configured to determine, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal. After the processor determines that the micro base station corresponds to the mobile device, the wired network interface transmits a monitoring signal to the micro base station, wherein the monitoring signal instructs the micro base station to monitor the mobile device on an operating frequency. The processor then causes the cable network interface to transmit a stop monitoring signal to the micro base station according to a stop condition, wherein the stop monitoring signal indicates that the micro base station stops monitoring the mobile device.

To achieve the above object, the present invention further provides a micro base station, wherein a wireless network system includes a server, a mobile device, a base station, and the micro base station. The micro base station includes a wired network interface, a first wireless network interface, and a second wireless network interface. The wired network interface is connected to the base station and is configured to receive a monitoring signal from the base station. The first wireless network interface is configured to monitor the mobile device on an operating frequency according to the monitoring signal, and detect a signal transmitted by the mobile device. After detecting the signal, the first wireless network interface stops monitoring the mobile device, and the wired network interface transmits a response signal corresponding to the monitoring signal to the base station, and the base station receives the response. After the signal, a handoff signal is transmitted to the mobile device, wherein the handoff signal indicates that the mobile device hands over to the micro base station to connect to the second wireless network interface.

To achieve the above object, the present invention further provides a micro base station, wherein a wireless network system includes a server, a mobile device, a base station, and the micro base station. The micro base station includes a wired network interface and a wireless network interface. The wired network interface is connected to the base station and is configured to receive a monitoring signal from the base station. The wireless network interface is configured to monitor the mobile device according to the monitoring signal, and the mobile device transmits the monitored signal within a preset time interval after receiving the monitoring signal. One of the signals. The wired network interface receives a stop monitoring signal from the base station after the preset time interval, and the first wireless network interface stops monitoring the mobile device because it should stop monitoring the signal.

To achieve the above object, the present invention further provides a handoff monitoring method for a base station. A wireless network system includes a server, a mobile device, the base station, and a micro base station. The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a range of signals. The wired network interface is connected to the server and the micro base station. The handoff monitoring method includes the following steps: (a) wirelessly connecting the wireless network interface to the mobile device when the mobile device is within the coverage of the signal; (b) after the step (a), causing the cable The network interface obtains information related to the mobile device from the server; (c) the processor determines, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; (d) in the step (c) thereafter, causing the cable network interface to transmit a monitoring signal to the micro base station, the monitoring signal instructing the micro base station to monitor the mobile device at an operating frequency; (e) after step (d), The wired network interface receives a response signal corresponding to the monitoring signal from the pico base station; and (f) after step (e), causing the wireless network interface to transmit a handoff signal to the mobile device, The hand change signal indicates that the mobile device is handed over to the micro base station.

To achieve the above object, the present invention further provides a handoff monitoring method for a base station. A wireless network system includes a server, a mobile device, the base station, and a micro base station. The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a range of signals. The wired network interface is connected to the server and the micro base station. The handoff monitoring method includes the following steps: (a) wirelessly connecting the wireless network interface to the mobile device when the mobile device is within the coverage of the signal; (b) after the step (a), causing the cable The network interface obtains information related to the mobile device from the server; (c) the processor determines, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; (d) in the step (c) thereafter, causing the cable network interface to transmit a monitoring signal to the micro base station, the monitoring signal instructing the micro base station to monitor one of the mobile devices at an operating frequency; (e) in step (d) After the step (e), the cable network interface transmits a stop monitoring signal to the wired network interface of the micro base station, and the monitoring signal is stopped. The wireless network interface of the micro base station is instructed to stop monitoring the mobile device.

To achieve the above object, the present invention further provides a hand-over monitoring method for a micro base station. A wireless network system includes a server, a mobile device, a base station, and the micro base station. The micro base station includes a wired network interface, a first wireless network interface, and a second wireless network interface. The wired network interface is connected to the base station. The handoff monitoring method includes the following steps: (a) causing the wired network interface to receive a monitoring signal from the base station; (b) after step (a), causing the first wireless network interface to be based on the monitoring signal Monitoring the mobile device at an operating frequency and detecting a signal transmitted by the mobile device; (c) after step (b), causing the first wireless network interface to stop monitoring the mobile device; and (d) Having the cable network interface transmit a response signal corresponding to one of the monitoring signals to the base station, and after receiving the response signal, the base station transmits a handoff signal to the mobile device, the handoff signal indicating the mobile device The hand is transferred to the micro base station to connect to the second wireless network interface.

To achieve the above object, the present invention further provides a hand-over monitoring method for a micro base station. A wireless network system includes a server, a mobile device, a base station, and the micro base station. The micro base station includes a wired network interface and a first wireless network interface. The wired network interface is connected to the base station. The handoff monitoring method includes the following steps: (a) causing the wired network interface to receive a monitoring signal from the base station; and (b) after step (a), causing the wireless network interface to operate according to the monitoring signal. Monitoring the mobile device on the frequency, and detecting, in a preset time interval after the wired network interface receives the monitoring signal, one of the signals transmitted by the mobile device; (c) after the preset time interval And causing the wired network interface to receive a stop monitoring signal from the base station; and (d) after the wired network interface receives the stop monitoring signal, causing the first wireless network interface to stop monitoring the mobile device.

It can be seen from the above that after the mobile station enters its signal coverage range, the base station of the present invention transmits a monitoring signal to the micro base station, so that the micro base station monitors the mobile device according to the monitoring signal. If the monitoring result of the micro base station is that the mobile device is within the coverage of the signal, the micro base station transmits a response signal to the base station, and the base station instructs the mobile device to change hands. In this way, the problem of the idleness of the micro base station in the prior art and the problems caused by the network-activated hand change can be solved.

The above objects, technical features, and advantages will be more apparent from the following description.

The base station, the micro base station, and the handover monitoring method thereof of the present invention will be explained below through various embodiments. It should be noted that the present invention mainly relates to a base station of a wireless network system, a micro base station, and a mobile device and a hand-over monitoring method therebetween. Therefore, in the following embodiments and drawings, elements and steps that are not directly related to the present invention have been omitted and are not shown. In addition, in order to clearly disclose the technical features of the present invention, the related drawings of the present invention are all drawn in a slightly exaggerated manner. This is intended to be illustrative, not limiting, and the scope of the claims is intended to be

The first embodiment of the present invention is a wireless network system 1. For a description, please refer to FIG. 1 and FIG. 2 in combination. 1 is a schematic diagram showing the architecture of the wireless network system 1, and FIG. 2 is a schematic diagram showing the internal components of the base station 11 and the micro base station 13 included in the wireless network system 1.

As shown in FIG. 1, the wireless network system 1 includes a base station 11, a micro base station 13, a server 15, and a mobile device 17. As shown in FIG. 2, the base station 11 includes a wired network interface 111, a processor 113, and a wireless network interface 115. The micro base station 13 includes a wired network interface 131, a processor 133, and a The first wireless network interface 135 and a second wireless network interface 137.

The processor 113 configured by the base station 11 and the processor 133 configured by the micro base station 13 perform the operations that can be performed by the conventional base station and the micro base station. In this embodiment, the parts will not be described. The wireless network interface 115 of the base station 11 defines a signal coverage area 110; the first wireless network interface 133 of the micro base station 13 defines a signal coverage area 130. In addition, the wired network interface 111 of the base station 11 is connected (for example, through a broadband fixed network) to the wired network interface 131 of the server 15 and the micro base station 13.

Initially, the mobile device 17 is located in the area 100 and moves along the path 120 to the area 102. After the mobile device 17 moves to the area 102, since the mobile device 17 is located within the signal coverage area 110 of the base station 11, the wireless network interface 115 of the base station 11 is wirelessly connected to the mobile device 17. This part is a general knowledge in the technical field to which the present invention pertains, and thus is not to be construed.

After the wireless network interface 115 of the base station 11 is wirelessly connected to the mobile device 17, the wired network interface 111 obtains information related to the mobile device 17 from the server 15. Based on the information, the processor 113 determines that the micro base station 13 corresponds to the mobile device 17 and is located within the signal coverage area 110 of the base station 11. In detail, since the micro base station 13 operates in a licensed wireless frequency band, when the user purchases the micro base station 13, the relevant record is inevitably stored in the server 15. In addition, the server 15 also records the data of the user's mobile device 17. Therefore, the information obtained by the wired network interface 111 of the base station 11 from the server 15 is related to the records and materials.

After the processor 113 determines that the micro base station 13 corresponds to the mobile device 17, the wired network interface 111 transmits a monitoring signal to the micro base station 13, and the monitoring signal carries an operation frequency information, thereby indicating that the micro base station 13 The mobile device 17 is monitored at one of the operating frequencies indicated by the operating frequency information. The wired network interface 131 of the micro base station 13 receives the monitoring signal. After receiving the monitoring signal, the micro base station 13 starts its first wireless network interface 133 to start monitoring the mobile device 17 on the operating frequency.

On the other hand, after the base station 11 transmits a monitoring signal to the micro base station 13 in its wired network interface 111, the wireless network interface 115 transmits a handoff signal to the mobile device 17 according to different conditions, or The cable network interface 111 is caused to transmit a stop monitoring signal to the micro base station 13. In short, if the wired network interface 111 of the base station 11 receives a response signal corresponding to the monitoring signal from the pico base station 13, the wireless network interface 115 transmits a handoff signal to the mobile device 17. When the processor 113 determines that a stop condition is met, the cable network interface 111 transmits a stop monitoring signal to the micro base station 13 according to the stop condition. The stop monitoring signal instructs the micro base station 13 to stop monitoring the mobile device 17.

First, the case where the base station 11 causes its wireless network interface 115 to transmit a handoff signal to the mobile device 17, that is, the case where the mobile device 17 enters the signal coverage area 130 of the micro base station 13 will be described. Assuming that the micro base station 13 receives the monitoring signal, the mobile device 17 moves along the path 122 to the area 104 and is thus within the signal coverage area 130. At this time, if the mobile device 17 transmits a signal, the first wireless network interface 133 of the micro base station 13 can also detect the signal, and thus the mobile device 17 is located within the signal coverage area 130. After detecting the signal, the first wireless network interface 133 of the micro base station 13 stops monitoring the mobile device 17, and the wired network interface 131 transmits a response signal corresponding to the monitoring signal to the base station 11 in response to the base. The monitoring signal previously transmitted by station 11. This response signal indicates that the mobile device 17 enters the signal coverage area 130 of the micro base station 13. The wired network interface 111 of the base station 11 receives the response signal. Thereafter, the wireless network interface 115 of the base station 11 transmits a handoff signal to the mobile device 17, and the handoff signal indicates that the mobile device 17 hands over to the micro base station 13. After receiving the handoff signal, the mobile device 17 hands over to the second wireless network interface 137 of the micro base station 13 and connects through the second network interface 137.

It should be noted that whether the first wireless network interface 133 of the micro base station 13 detects the operation of the signal transmitted by the mobile device 17, other embodiments may further limit whether the operation of the portion is determined by a preset. In the time interval. In these other embodiments, if the micro base station 13 detects that the mobile device 17 transmits a signal within a preset time interval after receiving the monitoring signal, the response signal is transmitted to the base station 11. In addition, other embodiments of the present invention may further limit that when the strength of the signal transmitted by the mobile device 17 is greater than a threshold, the first wireless network interface 135 of the micro base station 13 detects the mobile device 17 The signal transmitted.

Next, the base station 11 is caused to have its wired network interface 111 transmit a stop monitoring signal to the micro base station 13. In this case, the base station 11 must judge whether or not a stop condition is met. For example, the mobile device 17 does not enter the signal coverage range 130 of the micro base station 13 (that is, after the micro base station 13 receives the monitoring signal, the mobile device 17 has not entered the signal coverage range of the micro base station 13 130 Or the case where the mobile device 17 enters the signal coverage range 130 after exceeding a predetermined time interval, can be set as the stop condition for stopping the monitoring. In either case, the first wireless network interface 135 does not detect the signal transmitted by the mobile device 17 within a preset time interval after the wired network interface 131 of the micro base station 13 receives the monitoring signal. Therefore, the wired network interface 131 of the micro base station 13 will not transmit a response signal corresponding to the monitoring signal to the base station 11.

Since the micro base station 13 does not transmit the response signal, the base station 11 observes that the wired network interface 111 does not receive a corresponding correspondence from the pico base station 13 within the preset time interval after transmitting the monitoring signal. The response signal of the monitoring signal. Therefore, the base station 11 knows that the mobile device 17 has not entered the signal coverage range 130 of the micro base station 13, and the processor 113 therefore judges that the stop condition of the stop monitoring is met, and according to the determination result, the wired network interface 111 is transmitted. Upon stopping the monitoring signal to the micro base station 13, the stop monitoring signal instructs the micro base station 13 to stop monitoring the mobile device 17. The wired network interface 131 of the micro base station 13 receives the stop monitoring signal, and the first wireless network interface 135 thus stops monitoring the mobile device 17.

For another example, the stop condition may also be set to be the case where the mobile device 17 is located outside the signal coverage range 110 of the wireless network interface 115 of the base station 11. Therefore, when the wireless network interface 115 of the base station 11 determines that the mobile device 17 moves outside the signal coverage range 110, the wired network interface 111 transmits a stop monitoring signal to the micro base station 13 to make the micro base station 13 A wireless network interface 135 stops monitoring the mobile device 17. The above-mentioned several stop conditions are only used as an example, and those skilled in the art to which the present invention pertains should be able to understand that the present invention can also determine the stop condition based on other factors.

Through the configuration and operation of the first embodiment, the base station of the present invention can notify the micro base station to monitor the mobile device, and the base station decides whether to notify the mobile device to change hands to the micro base station according to the monitoring result of the micro base station. It can solve the problem of the idleness of the micro base station in the prior art and the problems caused by the network-activated hand change.

The second embodiment of the present invention is also a wireless network system 1. For the description, please refer to FIG. 1 , FIG. 2 , FIG. 3A and FIG. 3B . The main difference between the second embodiment and the first embodiment is that the second embodiment specifies the wireless network system 1 to comply with the Worldwide Interoperability for Microwave Access (WiMAX) standard. In other words, the base station 11, the micro base station 13, the server 15, and the mobile device 17 included in the wireless network system 1 of the second embodiment communicate according to the standard. Since the communication methods stipulated by the Global Interoperability for Microwave Access are well known to those of ordinary skill in the art, it is not to be understood. Only the differences between the second embodiment and the first embodiment will be described below.

3A and 3B are diagrams showing the signal transmission relationship of the second embodiment, wherein FIG. 3A depicts the case where the mobile device 17 enters the signal coverage range 130 of the micro base station 13, and FIG. 3B depicts the action. The device 17 does not enter the situation where the signal of the micro base station 13 covers the range 130.

In the 3A and 3B, when the mobile device 17 is located in the signal coverage area 110 of the base station 11, the mobile device 17 performs a wireless connection procedure 140 with the wireless network interface 115 of the base station 11 (including handoff to The program of the base station 11) is to wirelessly connect the two. Then, the wired network interface 111 of the base station 11 performs a mobile device information obtaining program 142 with the server 15 to obtain information related to the mobile device 17. Thereafter, the wired network interface 111 of the base station 11 transmits a monitoring signal 144 to the micro base station 13. The monitoring signal 144 carries a connection identifier (ID) and an operation frequency information of the mobile device 17, and the micro base station 13 Upon receipt of the monitoring signal 144, the first wireless network interface 135 can identify the monitoring mobile device 17 based on the connection at an operating frequency indicated by the operating frequency information. The concept of link identification is the usual knowledge in the global interoperability microwave access standard, so it is not a rumor.

Thereafter, the wireless network interface 115 of the base station 11 broadcasts an uplink scheduling message (uplink-MAP; UL-MAP) 146, and the uplink scheduling message 146 carries a resource configuration message corresponding to the connection identification. The resource configuration message carries a time interval in which the mobile device 17 corresponding to the link identification can transmit data. The concept of resource allocation messages is also a common knowledge in the global interoperability microwave access standards. Since the wireless network interface 115 broadcasts the uplink scheduled message 146 in a broadcast manner, the mobile device 17 and the micro base station 13 that are not in the signal coverage area 110 of the base station 11 receive the uplink scheduled message 146. Then, the first wireless network interface 135 of the micro base station 13 listens on the operating frequency indicated by the operating frequency information, and determines whether there is data transmission in the available time interval contained in the resource configuration message.

Please refer to Figure 3A. If the mobile device 17 transmits a signal (ie, an uplink protocol data unit 148) to the base station 11 within the available time interval contained in the resource configuration message, the first wireless network interface 135 of the micro base station 13 will detect This signal is detected (ie, the Uplink Protocol Data Unit 148). The wired network interface 131 of the micro base station 13 transmits a response signal 150 carrying the connection identification of the mobile device 17 to the base station 11, and stops monitoring the mobile device 17. Thereafter, the wireless network interface 115 of the base station 11 transmits a handoff signal 152 to the mobile device 17, and the handoff signal 152 carries information of the base station 11 and the micro base station 13. The mobile device 17 performs a wireless connection procedure 154 with the micro base station 13 based on the handoff signal 152 to wirelessly connect to the micro base station 13.

Please refer to Figure 3B. In FIG. 3B, after the uplink schedule message 146 is broadcasted by the wireless network interface 115, the mobile device 17 performs an outgoing network procedure 160 with the base station 11. In this case, the mobile device 17 does not enter the signal coverage area 130 of the micro base station 13, so the wired network interface 11 of the base station 11 transmits a stop monitoring signal 162 to the micro with the connection identification of the mobile device 17. Base station 13. After receiving the stop monitoring signal 162, the wired network interface 131 of the micro base station 13 stops monitoring the mobile device 17.

Through the configuration and operation of the second embodiment, when the wireless network system complies with the global interoperability microwave access standard, the problem of the idleness of the micro base station in the prior art and the problem caused by the network-activated hand change can also be solved.

A third embodiment of the present invention is a handoff monitoring method suitable for use in a wireless network system. The wireless network system comprises a base station, a micro base station, a server and a mobile device, wherein the base station, the micro base station, the server and the mobile device are respectively the base station 11 and the miniature of the first embodiment. The base station 13, the server 15, and the mobile device 17. 4A and 4B are flowcharts depicting a third embodiment in which the process depicted in FIG. 4A is performed by a base station and the process depicted in FIG. 4B is performed by a micro base station.

In addition, the handoff monitoring method described in the third embodiment can be executed by a computer program product, and after the base station 11 and the micro base station 13 respectively load the computer program product and execute the plurality of instructions included in the computer program product. The handoff monitoring method described in the third embodiment can be completed. The aforementioned computer program product can be stored in a computer readable recording medium, such as read only memory (ROM), flash memory, floppy disk, hard disk, optical disk, flash drive, tape, and can be stored by the network. The database is taken or in any other storage medium known to those skilled in the art and having the same function.

First, the hand-over monitoring method of the third embodiment will be described from the perspective of the base station, see FIG. 4A. In step S31, the wireless network interface 115 of the base station 11 is wirelessly coupled to the mobile device 17 when the mobile device 17 is within its signal coverage. Next, in step S32, the base station's wired network interface 111 obtains information related to the mobile device 17 from the server 15. Thereafter, step S33 causes the processor 113 to determine whether the micro base station 13 corresponds to the mobile device 17 and is within the coverage of the signal. If not, the hand change monitoring action is not performed. If the result of the determination in the step S33 is YES, the process of step S34 is continued to cause the wired network interface 111 to transmit a monitoring signal to the micro base station 13, wherein the monitoring signal instructs the micro base station 13 to monitor the mobile device 17 on an operating frequency.

Then, step S35 is executed to enable the base station to determine whether the wired network interface 111 receives a response signal from the micro base station 13 corresponding to the monitoring signal within a predetermined time interval. If the result of the determination in the step S35 is YES, the step S38 is executed to enable the wireless network interface 115 of the base station 11 to transmit a handoff signal to the mobile device 17, and the mobile device 17 can be handed over from the base station 11 to the micro base station 13. And connected to the second wireless network interface of the micro base station 13. If the result of the determination in the step S35 is no, the step S36 is executed to enable the base station to determine whether the mobile device 17 is located outside the coverage of the signal of the base station 11 (that is, whether the mobile device 17 has executed a leaving network procedure and has left the base. The signal of station 11 covers the scope). Then, if the result of the determination in the step S36 is YES, the cable network interface 111 transmits a stop monitoring signal to the micro base station 13 in step S37. The stop monitoring signal indicates that the wireless network interface of the micro base station stops monitoring the mobile device 17 . If the decision result in the step S36 is NO, the process returns to the step S35.

It should be noted that other implementations of the present invention may skip step S36; in other words, if the result of the determination in step S35 is no, step S37 is directly executed to cause the wired network interface 111 to transmit a stop monitoring signal to the micro base station 13, This stop monitoring signal indicates that the wireless network interface of the micro base station stops monitoring the mobile device 17. The significance of this embodiment is that if the base station 11 does not receive a response signal corresponding to the monitoring signal from the micro base station 13 within the preset time interval, the base station 11 will recognize the mobile device 17 for a period of time in the future. It will not enter the signal coverage of the micro base station 13 and will inform the micro base station to stop monitoring the mobile device 17.

Furthermore, the hand-over monitoring method of the present invention may have another aspect, which is performed directly after performing step S34. In this case, if the result of the determination in the step S36 is YES, the step S37 is executed to enable the wired network interface 111 to transmit a stop monitoring signal to the micro base station 13; if the result of the determination in the step S36 is no, the time interval is Then, step S36 is performed again. In this case, the base station 11 determines whether or not to notify the micro base station to stop the monitoring mobile device 17 based on the position of the mobile device 17.

It can be seen from the above several different aspects that the hand-over monitoring method applicable to the base station of the present invention can set a stop condition for stopping monitoring. When the stop condition is met, the base station's wired network interface transmits a stop monitoring signal to the micro base station. Those of ordinary skill in the art to which the present invention pertains should be able to understand how the present invention achieves a procedure for stopping monitoring based on other stopping conditions based on the above-described aspects.

Next, the handoff monitoring method of the third embodiment will be described from the perspective of a micro base station, see Fig. 4B. In step S41, the wired network interface 131 of the micro base station 13 receives a monitoring signal from the base station. Next, in step S42, the first wireless network interface 135 of the micro base station 13 determines whether a signal transmitted by the mobile device 17 is detected within a preset time interval. If the result of the step S42 is YES, the micro base station 13 performs step S43 to cause the cable network interface 131 to transmit a response signal corresponding to the monitoring signal to the base station 11. Thereafter, the micro base station 13 ends the method of changing the test. If the result of the step S42 is no, the micro base station 13 performs step S44 to determine whether the wired network interface 131 of the micro base station 13 receives a stop monitoring signal from the base station after the preset time interval. If the result of the determination in the step S44 is NO, the micro base station performs step S42 again; if the result of the determination in the step S44 is YES, the micro base station executes the step S45 to cause the first wireless network interface 135 to stop the monitoring mobile device 17.

Similarly, in other implementations, the foregoing monitoring signal and the stop monitoring signal carry the operating frequency information of one of the mobile devices 17. In this way, the step S42 causes the first wireless network interface 135 of the micro base station 13 to be based on The operating frequency information monitors or stops monitoring the mobile device 17 at an operating frequency. This operating frequency is the frequency at which the mobile device 17 wirelessly communicates with the base station 11. In addition, other implementations may further limit that when the strength of the signal transmitted by the mobile device 17 is greater than a threshold, the signal transmitted by the mobile device 17 is detected in step S42.

In addition to the above steps, the third embodiment can also perform all the operations and functions described in the first embodiment, and those skilled in the art can directly understand how the third embodiment performs the operations based on the above first embodiment and Function, so I won't go into details.

The fourth embodiment of the present invention is a handoff monitoring method suitable for a wireless network system. The wireless network system also includes a base station, a micro base station, a server, and a mobile device. The difference between the fourth embodiment and the third embodiment is that the handoff monitoring method of the fourth embodiment is applicable to a wireless network system conforming to the global interoperability microwave access standard. Only the differences between the fourth embodiment and the third embodiment will be described below.

Figure 5 depicts a handoff monitoring method performed by a base station. The base station first performs steps S31 to S34, and the steps are substantially the same as those described in the third embodiment, except that the monitoring signal of the fourth embodiment carries a link identification of the mobile device. Then, the base station performs step S51 to cause the base station's wireless network interface 112 to broadcast an uplink scheduling message, and the uplink scheduling message carries a resource configuration corresponding to the connection identification. Thereafter, the base station performs steps S35 through S38, which are substantially the same as those described in the third embodiment. However, in the fourth embodiment, the response signal received in step S35 carries the connection identification of the mobile device, and the stop monitoring signal transmitted in step S37 also carries the connection identification of the mobile device.

From the perspective of the micro base station 13, when the wireless network system complies with the global interoperability microwave access standard, the micro base station 13 also performs the process illustrated in Fig. 4B. The difference is only in the fourth embodiment, the monitoring signal described in step S41 carries one of the mobile devices to identify the connection, the signal detected in step S42 is the uplink data protocol unit, and the response signal described in step S43 carries the mobile device. The connection identification, the stop monitoring signal described in step S44 also carries the connection identification of the mobile device.

In addition to the above steps, the fourth embodiment can also perform all the operations and functions described in the second embodiment, and those skilled in the art can directly understand how the fourth embodiment performs the operations based on the above second embodiment and Function, so I won't go into details.

It can be seen from the above that after the mobile station enters its signal coverage range, the base station of the present invention transmits a micro base station of the monitoring signal, so that the micro base station monitors the mobile device according to the monitoring signal. If the monitoring result of the micro base station is that the mobile device is within the coverage of the signal, the micro base station transmits a response signal to the base station, and the base station instructs the mobile device to change hands. In this way, the problem of the idleness of the micro base station in the prior art and the problems caused by the network-activated hand change can be solved.

The above-mentioned embodiments are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any changes or equivalents that can be easily made by those skilled in the art are within the scope of the invention. The scope of the invention should be determined by the scope of the claims.

1. . . Wireless network system

100. . . region

102. . . region

104. . . region

11. . . Base station

110. . . Signal coverage

111. . . Wired network interface

113. . . processor

115. . . Wireless network interface

120. . . path

122. . . path

13. . . Micro base station

130. . . Signal coverage

131. . . Wired network interface

133. . . processor

135. . . First wireless network interface

135. . . Second wireless network interface

140. . . Wireless linker

142. . . Mobile device information acquisition program

144. . . Monitoring signal

146. . . Upstream scheduling message

148. . . Upper agreement data unit

15. . . server

150. . . Response signal

152. . . Change hand signal

154. . . Wireless linker

17. . . Mobile device

1 is a schematic diagram showing the architecture of a wireless network system of the first embodiment;

2 is a schematic diagram showing the internal components of the base station and the micro base station of the first embodiment;

3A and 3B are diagrams depicting a signal transfer relationship of the second embodiment;

4A and 4B are schematic views showing the flow of the third embodiment;

Figure 5 is a flow chart depicting a hand-over monitoring method performed by the base station of the fourth embodiment.

11. . . Base station

13. . . Micro base station

15. . . server

17. . . Mobile device

140. . . Wireless linker

142. . . Mobile device information acquisition program

144. . . Monitoring signal

146. . . Upstream scheduling message

148. . . Uplink protocol data unit

150. . . Response signal

152. . . Change hand signal

154. . . Wireless linker

Claims (14)

A base station, a wireless network system comprising a server, a mobile device, a femtocell and the base station, the wireless network system conforming to a global interoperability (Worldwide Interoperability) For the Microwave Access (WiMAX) standard, the base station includes: a wireless network interface defining a signal coverage range and configured to wirelessly connect the mobile device to the mobile device when the mobile device is within the coverage of the signal; a router interface, connected to the server and the micro base station, and configured to obtain information related to the mobile device from the server after the wireless network interface is wirelessly connected to the mobile device; and a processor And determining, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; wherein, after the processor determines that the micro base station corresponds to the mobile device, the wired network interface transmits a monitoring Signal to the micro base station, the monitoring signal carries a connection ID of the mobile device, and the wireless network interface is wider Broadcasting an uplink scheduling message (uplink-MAP; UL-MAP), the uplink scheduling message carrying a resource configuration message corresponding to the connection identifier, the monitoring signal indicating that the micro base station identifies and configures the resource according to the connection The message monitors the mobile device at an operating frequency, and the wired network interface receives a response signal corresponding to the monitoring signal from the micro base station, and the wireless network interface transmits a handoff signal to the response signal. The mobile device indicates that the mobile device changes hands to the micro base station. A base station, a wireless network system comprising a server, a mobile device, a micro base station and the base station, wherein the wireless network system is consistent with one The ball intercommunication microwave access standard, the base station includes: a wireless network interface defining a signal coverage range and configured to wirelessly connect the mobile device to the mobile device when the mobile device is within the coverage of the signal; a wired network The interface is connected to the server and the micro base station, and is configured to obtain, after the wireless network interface is wirelessly connected to the mobile device, information related to the mobile device from the server; and a processor, And determining, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; wherein, after the processor determines that the micro base station corresponds to the mobile device, the wired network interface transmits a monitoring signal Up to the micro base station, the monitoring signal carries a connection identifier of the mobile device, and the wireless network interface further broadcasts an uplink scheduling message, where the uplink scheduling message carries a resource configuration message corresponding to the connection identifier. The monitoring signal instructs the micro base station to monitor the mobile device on an operating frequency according to the connection identification and the resource configuration message, and thereafter According to a stop condition, a wired network interface enabling the monitor to transmit a stop signal to the micro base station, the stop signal indicating that the monitored micro base station stops monitoring the mobile device. The base station of claim 2, wherein the stop condition is that the wired network interface does not receive a response signal corresponding to the monitoring signal within a preset time interval after transmitting the monitoring signal. The base station of claim 2, wherein the stopping condition is that the mobile device is outside the coverage of the signal. A micro base station, a wireless network system including a server, a mobile device a wireless base station, the base station and the micro base station, the wireless network system conforms to a global interoperability microwave access standard, the micro base station includes: a wired network interface, connected to the base station, and used to The base station receives a monitoring signal, and the monitoring signal carries a connection identification of the mobile device; a first wireless network interface is configured to receive an uplink scheduling message from the base station, where the uplink scheduling message carries a corresponding The link identifies a resource configuration message, monitors the mobile device on an operating frequency according to the link identification and the resource configuration message, and detects a signal transmitted by the mobile device; and a second wireless network interface; After detecting the signal, the first wireless network interface stops monitoring the mobile device, and the wired network interface transmits a response signal corresponding to the monitoring signal to the base station, and the base station receives the signal. After the response signal, a handoff signal is transmitted to the mobile device, and the handoff signal indicates that the mobile device switches hands to the micro base station to connect with the second wireless network interface. The micro base station of claim 5, wherein the strength of one of the signals is greater than a threshold. A micro base station, a wireless network system comprising a server, a mobile device, a base station and the micro base station, the wireless network system conforming to a global interoperability microwave access standard, the micro base station comprising: a wired network interface, connected to the base station, and configured to receive a monitoring signal from the base station, the monitoring signal carrying a connection identification of the mobile device; and a wireless network interface for the base station Receive an upstream scheduling message The uplink scheduling message carries a resource configuration message corresponding to the connection identifier, and the mobile device is monitored on an operating frequency according to the connection identification and the resource configuration message, and the monitoring signal is received on the wired network interface. In the latter preset time interval, one of the signals transmitted by the mobile device is not detected; wherein the wired network interface receives a stop monitoring signal from the base station after the preset time interval, the wireless The network interface should stop monitoring the signal and stop monitoring the mobile device. A hand-over monitoring method for a base station, a wireless network system comprising a server, a mobile device, the base station and a micro base station, the wireless network system conforming to a global interoperability microwave access standard, The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a signal coverage area, and the wired network interface is connected to the server and the micro base station. The hand monitoring method comprises the steps of: (a) wirelessly connecting the wireless network interface to the mobile device when the mobile device is within the coverage of the signal; (b) after the step (a), causing the wired network The interface obtains information related to the mobile device from the server; (c) the processor determines, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; (d) in step (c) After the cable network interface transmits a monitoring signal to the micro base station, the monitoring signal carries a link identification of the mobile device; (g) after the step (d), the wireless network interface broadcasts a Upstream scheduling Information, the uplink scheduling message carrying a corresponding one of the link to identify the resource configuration information The monitoring signal instructs the micro base station to monitor the mobile device on an operating frequency according to the connection identification and the resource configuration message; (e) after step (g), the wired network interface from the micro base station Receiving a response signal corresponding to the monitoring signal; and (f) after step (e), causing the wireless network interface to transmit a handoff signal to the mobile device, the hand signal indicating that the mobile device is handed over to the mobile device Micro base station. A hand-over monitoring method for a base station, a wireless network system comprising a server, a mobile device, the base station and a micro base station, the wireless network system conforming to a global interoperability microwave access standard, The base station includes a wireless network interface, a wired network interface, and a processor. The wireless network interface defines a signal coverage area, and the wired network interface is connected to the server and the micro base station. The hand monitoring method comprises the steps of: (a) wirelessly connecting the wireless network interface to the mobile device when the mobile device is within the coverage of the signal; (b) after the step (a), causing the wired network The interface obtains information related to the mobile device from the server; (c) the processor determines, according to the information, that the micro base station corresponds to the mobile device and is located within the coverage of the signal; (d) in step (c) After that, the wired network interface transmits a monitoring signal to the micro base station, the monitoring signal carries a link identification of the mobile device; (g) after the step ((d), the wireless network interface broadcasts Upstream scheduling a message, the uplink scheduling message carries a resource configuration message corresponding to the connection identifier, the monitoring signal instructing the micro base station to identify and the resource according to the connection Configuring the message to monitor one of the mobile devices at an operating frequency; (e) after the step (g), causing the processor to determine that a stop condition is met; and (f) after the step (e), causing the wired network The interface transmits a stop monitoring signal to the wired network interface of the micro base station, and the stop monitoring signal indicates that the micro base station stops monitoring the mobile device. The handoff monitoring method of claim 9, wherein the stopping condition is that the wired network interface does not receive a response signal corresponding to the monitoring signal within a preset time interval after transmitting the monitoring signal. The handoff monitoring method of claim 9, wherein the stopping condition is that the mobile device is outside the coverage of the signal. A hand-over monitoring method for a micro base station, the wireless network system comprising a server, a mobile device, a base station and the micro base station, the wireless network system conforming to a global interoperability microwave access standard The micro base station includes a wired network interface, a first wireless network interface, and a second wireless network interface. The wired network interface is connected to the base station. The handoff monitoring method includes the following steps: a) causing the wired network interface to receive a monitoring signal from the base station, the monitoring signal carrying a connection identification of the mobile device; (e) after the step (a), causing the first wireless network interface to The base station receives an uplink scheduling message, where the uplink scheduling message carries a resource configuration message corresponding to the connection identifier; (b) after step (e), causing the first wireless network interface to be based on the monitoring signal Monitoring the mobile device on an operating frequency, and identifying and funding the resource based on the connection The source configuration message detects a signal transmitted by the mobile device; (c) in step (b), causing the first wireless network interface to stop monitoring the mobile device; and (d) after step (b), The wired network interface transmits a response signal corresponding to one of the monitoring signals to the base station, and after receiving the response signal, the base station transmits a handoff signal to the mobile device, and the handoff signal indicates that the mobile device changes The hand is connected to the micro base station to connect to the second wireless network interface. The handoff monitoring method of claim 12, wherein the strength of the signal detected by the step (b) is greater than a threshold. A hand-over monitoring method for a micro base station, the wireless network system comprising a server, a mobile device, a base station and the micro base station, the wireless network system conforming to a global interoperability microwave access standard The micro base station includes a wired network interface and a wireless network interface, and the wired network interface is connected to the base station. The handover monitoring method includes the following steps: (a) making the wired network interface The base station receives a monitoring signal, and the monitoring signal carries a connection identification of the mobile device; (e) after step (a), causing the wireless network interface to receive an uplink scheduling message from the base station, the upstream row The process message carries a resource configuration message corresponding to the link identification; (b) after step (e), causing the wireless network interface to monitor the mobile device on an operating frequency according to the link identification and the resource configuration message, And one of the signals transmitted by the mobile device is not detected within a preset time interval after the wired network interface receives the monitoring signal; (c) after the predetermined time interval, causing the cable network interface to receive a stop monitoring signal from the base station; and (d) after the cable network interface receives the stop monitoring signal, the wireless network interface is Stop monitoring the mobile device.